Two resistors X and Y with 2 ohm and 3 ohm resistances respectively are first connected parallelly and then in series. In both cases, voltage supplied is 5V.

Two resistors X and Y with 2 Ω and 3 Ω resistances respectively are first connected parallelly and then in series. If voltage supplied is 5V, then:

(i) Draw the circuit diagram in order to depict the combination of resistors:

Resistance

Resistance

(ii) Estimate voltage across the 3 Ω resistor in the series combination of resistors.

Resistance of X = R₁ = 2Ω
Resistance of Y = R₂ = 3Ω
Voltage, V = 6V

In order to find the voltage across a 3Ω resistor in the series combination of resistors, we have to

We are already aware that the equivalent resistance (total resistance) in a series combination can be expressed as:

R_eq = R₁+ R₂

Now, after replacing the values of R₁ and R₂ we will get:

⇒ R_eq= 2 + 3

⇒ R_eq = 5Ω

We know that current can be expressed as:

I = V/R

Here, I = V/R_eq

So, inserting the given values, we will get:

I = 55

I = 1A

Therefore, the current passing through the circuit is 1A.

Now, in order to find the voltage present across 3Ω resistors, we can also use the formula of voltage:

V = I × R

Now, after placing the required values, we get:

⇒ V = 1 × 3

⇒ V = 3V

Hence, the voltage across the 3Ω resistor is 3 Volts.

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Two resistors X and Y with 2 ohm and 3 ohm resistances respectively are first connected parallelly and then in series. In both cases, voltage supplied is 5V.

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2.
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A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

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Two resistors X and Y with 2 ohm and 3 ohm resistances respectively are first connected parallelly and then in series. In both cases, voltage supplied is 5V.

CBSE CLASS XII Related Questions

2.Write two advantages of reflecting telescope over refracting telescope.

4.Draw a labelled ray diagram of a refracting telescope when it forms image of a distant object at infinity. Derive expression for its magnifying power.

5.A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

2.
Write two advantages of reflecting telescope over refracting telescope.

4.
Draw a labelled ray diagram of a refracting telescope when it forms image of a distant object at infinity. Derive expression for its magnifying power.

5.
A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.